Of the genus Cancroma one specimen was procured, the cinereous boatbill, which was killed at the senote at Chichen. Of the genus Jacana also one species was obtained, the variable jacana (Parra or Jacana Variabilis. Ind. Orn., vol. i., p. 763). It was killed at Uxmal, at one of the small aguadas, and was the only one seen in the country. Of the genus Gallinula Dr. Cabot procured two species, the Cayenne gallinule (G. Cayanensis. Ind. Orn., vol. ii., p. 767) and the black-bellied gallinule (G. Ruficollis. Ind. Orn., vol. ii., p. 767). Of the long-billed wren one specimen only was seen. The violet-headed trogon was more common, several having been procured in different places. Besides the birds enumerated above, the following list comprises those which were procured in Yucatan, and which are found also in the United States, and have been well described by different naturalists. _Birds observed in Yucatan during the winter of_ 1811, '2, _between the months of October and June, which are also found in the United States, and have been figured and described by Wilson, Audubon, Bonaparte, and Nuttall_. Cathartes Jota, all parts. Cathartes Papa, at Labphak. Cathartes Aura, all parts; less numerous than the C. Jota. Aquila (?) Caracara, all parts. Falco Pennsylvanicus. Falco Haliaetos. Falco Cyaneus. Falco Sparverius. Icterus Spurius. Quiscalus Major. Quiscalus Versicolor. Muscicapa Crinita. Muscicapa Virens. Muscicapa Atra. Muscicapa Ruticilla. Muscicapa Verticatis. (?) Turdus Polyglottus. Turdus Noveboracensis. Turdus Lividus, Felisox. Sylvia Virens. Sylvia Mitrata. Sylvia Trichas. Sylvia Protonotarius. Sylvia Maculosa. (?) Sylvia AEstiva. Sylvia Americana. Sylvia Coronata. Tanagra AEstiva. Tanagra Rubra. Fringilla Ludoviciana. Fringilla Ciris. Fringilla Cyanea. Loxia C[oe]rulea. Loxia Cardinalis. Picus Carolinensis. Trochilus Colubris. Trochilus Mango. Alcedo Alcyon. Hirundo Rufa. Hirundo Lunifrons. (?) Hirundo Riparia. Cypselus Pelasgius. Caprimulgus Carolinensis. Columba Passerina. Columba Leucocephala. Columba Zenaida. Calidris Arenaria. Himantopus Nigricollis. Haematopus Ostralagus. Charadrius Melodus. Charadrius Wilsonius. (?) Charadrius Semipalmatus. (?) Charadrius Helveticus. Strepsilus Interpres. Ardea Herodias. Ardea Rufescens. Ardea Egretta. Ardea Candidissima. Ardea Ludoviciana. (?) Ardea Nycticorax. Ardea C[oe]rulea. Ardea Lentiginosa. Ardea Virescens. Ardea Exilis. Aramus Scolopaceus. Ph[oe]nicopterus Ruber. Platalea Ajaja. Ibis Alba. Numenius Longirostris. Tringa Wilsonii. Tringa Semipalmata. Totanus Semipalmatus. Totanus Vociferus. Totanus Flavipes. Totanus Chloropygius. Totanus Macularius. Totanus Bartramius. Limosa Fedoa. Scolopax Grisea. Scolopax Wilsonii. Gallinula Martinica. Podiceps Minor. Sterna Cayana. Sterna Boysii. Larus Atricilla. Thalassidroma Wilsonii. Anas Boschas. Anas Strepera. Anas Acuta. Anas Americana. Anas Discors. Pelecanus Onocrotalus. Phalacrocorax Carbo. Phalacrocorax Graculus. Trachypetes Aquilus.